php中的组json嵌套对象

Question

我有一个 json 响应，如下所示：$response ='[    {        "userSummaries": [            {                "id": "9910",                "status": "Active",                "name": "Jhon"            }        ]    },    {        "userSummaries": [            {                "id": "8754",                "status": "Active",                "name": "Jane"            }        ]    }]';我想用userSummaries这个 php 代码将其分组：$myArr = json_decode($response, true);      $result_arr = [];        array_walk($myArr,function($v,$k) use (&$result_arr){       $result_arr[key($v)] = $v[key($v)];     });       echo json_encode($result_arr);并且响应只返回一个数据：{"userSummaries":[{"id":"8754","status":"Active","name":"Jane"}]}是否可以得到这样的输出响应？：{"userSummaries":[{"id":"9910","status":"Active","name":"Jhon"}, {"id":"8754","status":"Active","name":"Jane"}, ]}通过网络尝试过，但没有找到解决方案这是我的脚本： https: //3v4l.org/tVkK5也尝试过这个：$class_array = array();foreach ($myArr as $sa) {    $class_array[$sa['userSummaries']][] = array('name' => $sa['name']);}但返回：Notice: Undefined index: name in /in/hvSFC on line 28Warning: Illegal offset type in /in/hvSFC on line 28Notice: Undefined index: name in /in/hvSFC on line 28Warning: Illegal offset type in /in/hvSFC on line 28[]需要帮忙

Answer 1

你很接近。您只需要在每个循环中引用键和第一个userSummaries，而不是使用整个...

$myArr = json_decode($response, true);

$result_arr = ["userSummaries"=>[]];

foreach($myArr as $user) {

    $result_arr["userSummaries"][] = $user['userSummaries'][0];

}

echo json_encode($result_arr);

结果是：

{"userSummaries":[

    {"id":"9910","status":"Active","name":"Jhon"},

    {"id":"8754","status":"Active","name":"Jane"}

]}

如果您预见每个中的 userSummaries 本身将有多个用户......那么这将起作用：

$response ='[

    {

        "userSummaries": [

            {

                "id": "9910",

                "status": "Active",

                "name": "Jhon"

            }

        ]

    },

    {

        "userSummaries": [

            {

                "id": "8754",

                "status": "Active",

                "name": "Jane"

            },

            {

                "id": "5421",

                "status": "Active",

                "name": "Bob"

            }

        ]

    }

]';

$myArr = json_decode($response, true);

$result_arr = ["userSummaries"=>[]];

foreach($myArr as $usergroup) {

    foreach($usergroup['userSummaries'] as $user) {

        $result_arr["userSummaries"][] = $user;

    }

}

echo json_encode($result_arr);

结果是：

{"userSummaries":[

    {"id":"9910","status":"Active","name":"Jhon"},

    {"id":"8754","status":"Active","name":"Jane"},

    {"id":"5421","status":"Active","name":"Bob"}

]}